20021103169 has 2 divisors, whose sum is σ = 20021103170. Its totient is φ = 20021103168.

The previous prime is 20021103161. The next prime is 20021103173. The reversal of 20021103169 is 96130112002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18506881600 + 1514221569 = 136040^2 + 38913^2 .

It is a cyclic number.

It is not a de Polignac number, because 20021103169 - 2³ = 20021103161 is a prime.

It is a super-2 number, since 2×20021103169² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20021103161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010551584 + 10010551585.

It is an arithmetic number, because the mean of its divisors is an integer number (10010551585).

Almost surely, 2^20021103169 is an apocalyptic number.

It is an amenable number.

20021103169 is a deficient number, since it is larger than the sum of its proper divisors (1).

20021103169 is an equidigital number, since it uses as much as digits as its factorization.

20021103169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 25.

The spelling of 20021103169 in words is "twenty billion, twenty-one million, one hundred three thousand, one hundred sixty-nine".